I have two leaky toilets most questions I have read that were posted on this subject have delt with one toilet and the most common problem being the wax seal.Would both seals go at one time if installed at the same time? Also could weather and drainage be a factor in this we have had a drough and now it has rained for several days lightly at first now steady today and there is poor drainage on the property. Both toilets are about 12 yrs old could it just be they are both worn out?